Finding the Fourth Proportional to 1,589.42, 2,188.40 and 1,443.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,589.42 : 2,188.40 = 1,443.62 : x
2. Step 2: Convert to fraction form
   1,589.42/2,188.40 = 1,443.62/x
3. Step 3: Cross multiply
   1,589.42x = 2,188.40 × 1,443.62
4. Step 4: Simplify right side
   1,589.42x = 3,159,218.01
5. Step 5: Solve for x
   x = 3,159,218.01/1,589.42
6. Step 6: Final answer
   x = 1,987.65